The new distribution contract CBS Corp. signed with Time Warner Cable Inc. last summer after a bitter fight could be a casualty of Comcast Corp.'s proposed acquisition of the pay-TV operator.

According to people familiar with the deal, it does not include provisions protecting all the terms of the pact should Time Warner Cable be acquired by a distributor with a sweeter arrangement. These people requested anonymity because the agreement is confidential.

Terms of the CBS-Time Warner Cable pact were never publicly disclosed, but Comcast, which signed a 10-year distribution agreement with CBS in 2010, is believed to be paying a lower fee to carry the network's TV stations. Should Comcast get regulatory approval of the Time Warner Cable purchase, it can carry CBS under its current deal.

One of the concerns of programmers is that a marriage of Comcast and Time Warner Cable would give one company too much leverage in contract negotiations with content providers. Combined, Comcast and Time Warner Cable would have 30 million subscribers around the country, including some of the nation's biggest markets.

CBS banks on fees from pay-TV distributors such as Comcast to help cover its programming costs, including sports. The company said last week that such fees would hit $2 billion by 2020 and reiterated that a Comcast acquisition of Time Warner Cable won't alter that projection.

Given all the regulatory scrutiny Comcast will face in its attempt to swallow Time Warner Cable, CBS may have an opening to renegotiate its deal with them in the coming months. Comcast will face a tough fight from consumer activists and media watchdogs. It probably doesn't want entertainment companies expressing concern about the acquisition as well.

CBS has solid relations with Comcast. In unveiling their 2010 distribution agreement, Comcast Chief Executive Brian Roberts said CBS Chief Executive Leslie Moonves was a "real leader." Moonves, in turn, complimented Roberts for his "vision," and last week during a CNBC interview Mooves said Comcast was a company that believes in "paying fairly for content."

That was in direct contrast to the 2013 CBS-Time Warner Cable negotiations. CBS pulled its signals from Time Warner Cable for a month and the two engaged in a nasty public fight that Moonves described as a "war." CBS was seen as the victor in that dispute as Time Warner Cable ended up losing more than 300,000 subscribers.

CBS is probably not the only programmer in this potential situation with Comcast. While at least one contract Time Warner Cable signed late in the year when speculation was swirling that the company might be acquired does contain protection clauses, such language is not routine.

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